doc/standalone/hf_14bsniff.md
Author: jacopo-j Frequency: HF (13.56 MHz) Hardware: RDV4 (flash recommended, optional)
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Passively sniffs ISO14443B communication between a reader and card, saving captured frames to flash (or RAM).
ISO14443B is used by certain transit cards, national ID cards, and access control systems (e.g., CEPAS, Calypso). This sniffer captures the full communication exchange for protocol analysis.
Identical workflow to 14A Sniffer but tuned for the 14443B modulation scheme. Captured frames include both PICC (card) and PCD (reader) traffic.
| LED | Meaning |
|---|---|
| 1 (A) | Sniffing active |
| 2 (B) | Tag command |
| 3 (C) | Reader command |
| 4 (D) | Flash unmounting |
| Action | Effect |
|---|---|
| Short press | Stop sniffing, save to flash, exit |
stateDiagram-v2
[*] --> Sniffing : Startup
Sniffing --> SaveToFlash : Button press
SaveToFlash --> [*] : Saved to hf_14bsniff.trace
make clean
make STANDALONE=HF_14BSNIFF -j
./pm3-flash-fullimage